Novel Targeted Radiotherapy in Pediatric Patients With Inoperable Relapsed or Refractory HGG

High-Grade Glioma Clinical Trial

Official title:

A Phase 1b, Open-Label, Study of a Novel Targeted Radiotherapy in Children, Adolescents and Young Adults With Inoperable Relapsed or Refractory High-Grade Glioma

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT05610891
• Other study ID #: DCL-17-001-pHGG
• Secondary ID: 13460625
• Status: Recruiting
• Phase: Phase 1
• Start date: October 1, 2023
• Est. completion date: September 2026

Study information

• Verified date: May 2024
• Source: Cellectar Biosciences, Inc.
• Contact: Kate Oliver
• Phone: 608-327-8125
• Email: clinical[@]cellectar.com
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The purpose of this dose finding study is to evaluate the safety and efficacy of 2 different dose levels of CLR 131 in children, adolescents and young adults with relapsed or refractory high-grade glioma (HGG).

Description:

This study is designed to further evaluate the safety and tolerability of CLR 131 at the selected doses in children, adolescents and young adults with relapsed or refractory malignant high-grade glioma. It will also determine the therapeutic activity defined as progression free survival and overall survival, antitumor activity (treatment response) defined as the reduction in tumor volume and identify the recommended Phase 2/3 dose of CLR 131 in children, adolescents and young adults with relapsed or refractory HGG.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 50
• Est. completion date: September 2026
• Est. primary completion date: May 2026
• Accepts healthy volunteers: No
• Gender: All
• Age group: 10 Years to 25 Years

Eligibility

Inclusion Criteria:

• Previously confirmed (histologically or cytologically) high grade glioma that is clinically or radiographically suspected to be relapsed, refractory, or recurrent

• = 10 years of age and = 25 years of age at time of consent/assent

• If = age 16 years, Karnofsky performance status of = 60. If < age 16 years, Lansky performance status = 60

• Platelets = 75,000/µL (last transfusion, if any, must be at least 1 week prior to study registration, and, unless deemed medically necessary, no transfusions are allowed between registration and dosing)

• Absolute neutrophil count = 750/µL

• Hemoglobin = 8 g/dL (last transfusion must be at least 1 week prior to study registration, and, unless deemed medically necessary, no transfusions are allowed between registration and dosing)

• Using the bedside Schwartz formula, estimated GFR (creatinine clearance) > 60 ml/min/1.73m2

• Alanine aminotransferase < 3 × ULN

• Bilirubin < 2 × ULN

• At least 1 measurable intracranial lesion with longest diameter of at least 10 mm on any imaging sequence.

• Patients with previously known neurological deficits must be clinically stable at time of enrollment and able to complete all study related procedures. Patients with documented or newly diagnosed neurological deficits will be enrolled at the investigator's discretion.

• If patient receives steroids for neurological symptom control, the dose must be stable (unchanged for three weeks prior to registration) or on a steroid tapering regimen. Initiation of steroids per routine care immediately prior to CLR 131 dosing is acceptable

• Patient or his or her legal representative is judged by the Investigator to have the initiative and means to be compliant with the protocol.

• Patient or his or her legal representative has the ability to read, understand, and provide written informed consent for the initiation of any study-related procedures.

• Female patients of childbearing potential must have a negative pregnancy test at screening and within 24 hours of dosing. It is recommended that female caregivers of childbearing potential have a negative pregnancy test within one week of dosing.

• Patients of childbearing potential must practice an effective method of birth control while participating on this study to avoid possible harm to the fetus.

Exclusion Criteria:

• Antitumor therapy or investigational therapy, within 3-half-lives of the agent preceding the present study. For certain types of radiation (craniospinal, total abdominal, whole lung [spot irradiation to skull-based metastases is not considered craniospinal radiation for the purposes of this study]), at least 3 months must have elapsed. Palliative focal radiation to non-target lesions should be completed at least 2 weeks prior to dosing. Patients participating in non-interventional clinical trials (i.e., non-drug) are allowed to participate in this trial

• History of hypersensitivity to thyroid protection medication (e.g., potassium iodide, Lugol's solution, etc.)

• Any other concomitant serious illness or organ system dysfunction (including cardiac and pulmonary dysfunction) that in the opinion of the Investigator would either compromise patient safety or interfere with the evaluation of the safety of the test drug.

• Major surgery within 6 weeks of enrollment unless delay in therapy poses unacceptable risk to the patient due to clinical progression (enrollment o such patients should be discussed with Medical Monitor)

• Known history of human immunodeficiency virus or uncontrolled, serious, active infection

• Pregnancy or breast-feeding

Related Conditions & MeSH terms

• Glioma
• High-Grade Glioma

Intervention

Drug:
• CLR 131
CLR 131 will be administered IV (intravenously) at a dose based on patients' BSA

Locations

Country	Name	City	State
Canada	Hospital for Sick Children	Toronto	Ontario
United States	Cincinnati Children's Hospital Medical Center	Cincinnati	Ohio
United States	UT Southwestern Medical Center	Dallas	Texas
United States	Texas Children's Cancer Center, Baylor College of Medicine	Houston	Texas
United States	University of Wisconsin, Carbone Cancer Center	Madison	Wisconsin
United States	Memorial Sloan Kettering Cancer Center	New York	New York
United States	Stanford University	Palo Alto	California
United States	Children's Hospital of Philadelphia	Philadelphia	Pennsylvania

Sponsors (2)

Lead Sponsor	Collaborator
Cellectar Biosciences, Inc.	National Cancer Institute (NCI)

Countries where clinical trial is conducted

United States,  Canada, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Safety Evaluation of CLR 131	Will be assessed by physical examination, performance status, vital signs, laboratory changes over time, and adverse events. Evaluations will use a nonparametric Wilcoxon Signed Rank test and a linear mixed effects modeling will be conducted to evaluate longitudinal changes.	Assessed throughout the study to 1-year post-infusion follow-up period
Primary	Efficacy Evaluation for Progression Free Survival	To determine the therapeutic activity defined as Progression Free Survival (PFS) using Kaplan Meier estimator. PFS is defined as the time from arm assignment until disease progression or death.	Day 84 post-infusion follow-up period through 3 years following completion of treatment.
Secondary	Treatment Response of CLR 131	Determine antitumor activity (treatment response) defined as the reduction in tumor volume, measured by MRI scans acquired as FLAIR images and based on the RAPNO criteria for responses.	From date of arm assignment until date of first documented progression or date of death from any cause, whichever comes first, assessed up to 48 months.
Secondary	Dose Determination for CLR 131	Identify the recommended Phase 2/3 dose of CLR 131 in relapsed pHGG patients based on both safety and efficacy assessments as defined by the primary endpoints concluded from this study.	From date of arm assignment until date of first documented progression or date of death from any cause, whichever comes first, assessed up to 48 months.
Secondary	Dosimetry Evaluation for Total Body and Organ	To determine total body and organ dosimetry, together, of CLR 131 in relapsed pHGG patients, measured by conjugate planar whole-body imaging and/or blood collection drawn for radiologic dosimetry analysis for a subset of patients. Organ time/activity integrals will be entered into OLINDA/EXM software to produce total body and organ dosimetry values for CLR 131.	4 hours post-infusion and concluding 4 weeks post-initial imaging
Secondary	Tumor Response to CLR 131	Determine the tumor uptake of CLR 131 and utility of SPECT/CT as a potential diagnostic for response. Images will be reconstructed using quantitative SPECT reconstruction methods with compensation for attenuation, scatter and the full collimator-detector response including septal penetration and scatter. A registered CT image will be used as the attenuation map for the SPECT images. Image data will be converted to activity per cubic centimeters using a sensitivity measurement made using a point source in air.	4 hours post-infusion and concluding 4 weeks post-initial imaging